US4263049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibre-reinforced product and method of preparing same
Assignee: Rockwool AS
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Filing: 1979-10-09
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Granted: 1981-04-21
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Expires: 1999-10-09
Abstract
Abstract A fibre-reinforced cementitious product comprising a fibre reinforcement, at least partly consisting of eucalyptus fibres.
Inventors
- 👤 Karl E. Hansen
- 👤 Peder Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:45
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C04B18/24; C04B18/248; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
An asbestos-free, fiber-reinforced cementitious product comprising a major portion of a cementitious material and a reinforcing quantity of a fibrous material including a sufficient amount of eucalyptus fibers to provide a final product having improved bending strength characteristics.
Claim 2
Dependent Claim
38 words
An asbestos-free, fiber-reinforced cementitious product comprising a major portion of a cementitious material and a reinforcing quantity of a fibrous material including a sufficient amount of eucalyptus fibers to provide a final product having improved bending strength characteristics.
Claim 3
Dependent Claim
33 words
A cementitious product as set forth in claim 1 wherein said eucalyptus fibers are present in an amount of from 3% to 10% by weight based on the total weight of the product.
Claim 4
Dependent Claim
35 words
A cementitious product as set forth in claim 1 wherein a sufficient quantity of said eucalyptus fibers are present to provide a bending strength of at least 165 kp/cm 2 after storage for four weeks.
Claim 5
Dependent Claim
17 words
A cementitious product as set forth in claim 1 wherein said fibrous material also includes synthetic fibers.
Claim 6
Dependent Claim
33 words
A cementitious product as set forth in claim 4 wherein said synthetic fibers are present in an amount of from 5% to 10% by weight based on the total weight of the product.
Claim 7
Dependent Claim
17 words
A cementitious product as set forth in claim 2 wherein said fibrous material also includes synthetic fibers.
Claim 8
Dependent Claim
33 words
A cementitious product as set forth in claim 6 wherein said synthetic fibers are present in an amount of from 5% to 10% by weight based on the total weight of the product.
Claim 9
Independent Claim
55 words
A method of preparing an asbestos-free, fiber-reinforced cementitious product comprising: dispersing in water a reinforcing quantity of a fibrous material including a sufficient amount of eucalyptus fibers to provide a final product having improved bending strength characteristics; stirring said dispersion while adding cementitious material thereto; molding the mixture thus formed; and storing the molded product.
Claim 10
Independent Claim
55 words
A method of preparing an asbestos-free, fiber-reinforced cementitious product comprising: dispersing in water a reinforcing quantity of a fibrous material including a sufficient amount of eucalyptus fibers to provide a final product having improved bending strength characteristics; stirring said dispersion while adding cementitious material thereto; molding the mixture thus formed; and storing the molded product.
Claim 11
Dependent Claim
22 words
A method as set forth in claim 8 wherein a polyelectrolyte is added along with the cementitious material during said stirring step.
Claim 12
Dependent Claim
16 words
A method as set forth in claim 8 wherein said fibrous material also includes synthetic fibers.
Claim 13
Dependent Claim
32 words
A method as set forth in claim 8 wherein said eucalyptus fibers are present in an mount of from 3% to 10% by weight based on the total weight of the product.
Claim 14
Dependent Claim
34 words
A method as set forth in claim 8 wherein a sufficient quantity of said eucalyptus fibers are present to provide a bending strength of at least 165 kp/cm 2 after storage for four weeks.
Claim 15
Dependent Claim
32 words
A method as set forth in claim 10 wherein said synthetic fibers are present in an amount of from 5% to 10% by weight based on the total weight of the product.
Claim 16
Dependent Claim
16 words
A method as set forth in claim 11 wherein said fibrous material also includes synthetic fibers.
Claim 17
Dependent Claim
32 words
A method as set forth in claim 14 wherein said synthetic fibers are present in an amount of from 5% to 10% by weight based on the total weight of the product.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |